President of Sony Computer Entertainment, Kazuo Hirai introduces the company's next generation portable entertainment divice, codenamed 'NGP', at an event in Tokyo on January 27, 2011. (Reuters/Kim Kyung-Hoon)

A TV cameraman takes video of the next generation portable entertainment divice, codenamed 'NGP', the first to feature 3G wireless connectivity from Sony Computer Entertainment in Tokyo on January 27, 2011. (AFP/Toru Yamanaka)

Japanese entertainment giant Sony unveiled the portable touchscreen PlayStation as it looks to launch a fresh challenge to Nintendo and Apple in the competitive mobile gaming market.Sony Corp's new handheld gaming device codenamed 'NGP' for Next Generation Portable is displayed in Tokyo January 27, 2011. (AP/Shizuo Kambayashi)